#ifndef __CPU_BETA_CPU_BTB_HH__
#define __CPU_BETA_CPU_BTB_HH__
// For Addr type.
#include "arch/alpha/isa_traits.hh"
class DefaultBTB
{
private:
struct BTBEntry
BTBEntry()
: tag(0), target(0), valid(false)
}
Addr tag;
Addr target;
bool valid;
};
public:
DefaultBTB(unsigned numEntries, unsigned tagBits,
unsigned instShiftAmt);
Addr lookup(const Addr &inst_PC);
bool valid(const Addr &inst_PC);
void update(const Addr &inst_PC, const Addr &target_PC);
inline unsigned getIndex(const Addr &inst_PC);
inline Addr getTag(const Addr &inst_PC);
BTBEntry *btb;
unsigned numEntries;
unsigned idxMask;
unsigned tagBits;
unsigned tagMask;
unsigned instShiftAmt;
unsigned tagShiftAmt;
#endif // __CPU_BETA_CPU_BTB_HH__